Help-Christina Aguilera hair

Two problems-

my friend and I are having this costume party, and I'd like to go as Christina Aguilera. I want to do hair like hers at the MTV 2001 Music Video Awards ((the scary dreads)) but a shorter version. My hair goes past my shoulders, and I've tried doing it before, but I HAVE NO CLUE HOW!!! HELP!!! here's some pictures to show you what I mean:

http://www.caguilera.com/displayimage.php?album=357&pos= 0
((it's scary, I know, but remember-it's a costume party))
http://www.caguilera.com/displayimage.php?album=357&pos= 6

There's a few Christina Styles I'd like to try for normal. My hair is naturally straight and kinda thick. And i leave it the same all the time-straight and hanging down my back. I want to try something new. Like this:
http://www.caguilera.com/displayimage.php?album=712&pos= 2
I would LOVE to have my hair in the famous "shorty curl bob"...the twenties flaaper look of hers:
http://www.caguilera.com/displayimage.php?album=459&pos= 0

but again, both of these, I'm not sure how she does it. I'm pretty inexperienced with my hair-all i ever do is french/dutch braid it....that's about it....so...can anyone help??? offer suggestions??? much thanks!!!